The plan was to end at Season 8 (which is two seasons and a half). I don’t think they were all recorded, but a good deal of them were. All had drafts.
We know the season will include the Bad Batch arc (four episodes) and the Siege on Mandalore (three episodes). That leaves five extra slots. I predict they won’t do Dark Disciple or Son of Dathomir considering they already have “finished” versions. Crystal Crisis, being a pre-vis reel and not a finished product, might be redone. But personally that arc doesn’t sound very exciting when they only have 5 episodes to finish the entire series. I really want to see the Cad Bane - Boba Fett shoot out.